https://bugs.webkit.org/show_bug.cgi?id=125049

Patch by Brian J. Burg <burg@cs.washington.edu> on 2013-12-02
Reviewed by Joseph Pecoraro.

Add a JavaScript file type, extension, and checker (JSChecker).
Use TextChecker for JavaScript tests, libraries, website resources,
etc. and use JSChecker for files within WebInspectorUI/UserInterface.

Amended tests for TextChecker to reflect the rule above.

* Scripts/webkitpy/style/checker.py:
(_all_categories): Add categories defined by JSChecker.
(FileType): Add file type for JS and re-number the enum.
(CheckerDispatcher._file_type): Detect .js files as JavaScript.
(CheckerDispatcher._create_checker):
Create a JSChecker or TextChecker depending on the file's path.

* Scripts/webkitpy/style/checker_unittest.py:
(CheckerDispatcherDispatchTest.assert_checker_js): Added.
(CheckerDispatcherDispatchTest.test_js_paths): Added.
(CheckerDispatcherDispatchTest.test_text_paths): Add new test paths
that end in .js but should be checked with TextChecker.
* Scripts/webkitpy/style/checkers/js.py: Added.
(JSChecker):
(JSChecker.__init__):
(JSChecker.check):
* Scripts/webkitpy/style/checkers/js_unittest.py: Added.
(JSTestCase):
(JSTestCase.assertNoError):
(JSTestCase.assertNoError.error_for_test):
(JSTestCase.assertError):
(JSTestCase.assertError.error_for_test):
(JSTestCase.test_no_error):
(JSTestCase.test_error):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@159969 268f45cc-cd09-0410-ab3c-d52691b4dbfc